<template>
  <div class="todo-header">
    <input type="text"  v-model='title' placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="add">
  </div>
</template>

<script>
import {nanoid} from 'nanoid'
export default {
  // eslint-disable-next-line vue/multi-word-component-names
  name: "Top",
  data(){
    return {
      title:''
    }
  },
  methods:{
    add(){
      if(!this.title.trim()) return alert('输入不能为空，请重新输入')
      //将用户输入包装成一个用户todo对象
      const todoObj = {id:nanoid(),title:this.title,completed:false}
      // eslint-disable-next-line vue/no-mutating-props

      this.$emit('receive',todoObj)
      this.title=''
    }
  },
}
</script>

<style scoped>
/*  header*/
.todo-header input{
  width: 500px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
  margin-bottom: 5px;

}
.todo-header input:focus{
  outline: none;
  border-color: rgba(82,168,236,0.8);
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.075) , 0 0 8px rgba(82,168,236,0.8);
}
</style>